Compensating superheater



Dec, 3, 1935. c w GQRDON 2,023,223

COMPENSAT ING SUPERHEATER Filed Dec. 5, 1932 INVENTOR C'f/YELES /A 60/?00 ATTORNEY UNITED SATES Patented Dec. 3, 1935 COMIENSATING SUPERHEATER Charles W. Gordon, Munster, Ind, assignor to The Superheater Company, New York, N. Y.

TEN? ii:

FFEQE My invention relates to an arrangement whereby the operators may regulate the final temperature of steam from a boiler with convenience and accuracy. In my prior Patent No. 1,959,100,

granted May 15, 1934, I have disclosed two arrangements whereby the final temperature of superheated steam may be controlled within close limits. Arrangements according to the present invention fall within the scope of the claims of my prior patent.

It is one of the objects of the said invention to provide an arrangement adapted to be readily installed in Stirling type boilers already in use.

In order that my invention, together with its objects and advantages, may be fully and readily understood, I will now describe in detail by way of example and in connection with the accompanying drawing, a superheater boiler selected from a number of possible embodiments of my invention. In the drawing:

The figure is a vertical sectional view of a boiler in accordance with my invention. In the arrangement illustrated, it indicates as a whole a boiler of the Stirling type having a setting H including the usual roof H a, a front upper drum [2, a rear upper drum M and a lower drum i6. Drums i2 and IE are connected by a front group of generating tubes l8, i 8 as well as by a rear group of generating tubes 29, 28. A bafile 2| is shown extending upwardly from the drum I6 part way to the drum I 2 and lying near the front edge of the group of tubes 20. It will be seen, that the two groups of tubes l8 and 29 may be regarded as a bank divided near its middle by the bafiie 2|. However, the front group of tubes I B may be staggered, if so desired, whereas the rear group of tubes 29 are necessarily arranged in rows to provide lanes permitting the insertion between the rows. of tubes 20 of a group of superbeater units one of which is shown at 22. Drum 56 is connected to drum it by a rear bank composed of tubes 24, 24, the drums i2 and I 4 being connected by circulators 26 and 28 in the usual manner to provide for steam flow and thermal circulation of water in the boiler. The tubes l8 and 26 are somewhat inclined to the vertical whereas the tubes 2 are nearly vertical, this being a common arrangement. It results, however, that a considerable space 29 is left between the 50 tubes 20 and the tubes 24. In the space 29, I employ a second group of superheater units one of which appears at 30. The units 22 and 30 lie nearly at the same level and a baffle 32 extends between the two groups of units. The upper end 5 of the bafile 32 is nearly at the same level as independent of the position of damper 37 and 10 each such damper has its independent adjusting means whereby the attendant is able to set dampers 36 and 3*! so that the total volume of gases may be divided between outlets 34 and 35 any desired proportion. As illustrated, two 1 5 sets of worm gearing t8 and 39 are provided for operating dampers 35 and SI respectively.

Preferably the heating surface in the group of units is a little less than half than that in group 38, but I do not limit myself to this. The heat- 20 ing in one group should, however, always be made less than that in the other. It is clear from the drawing, that gases which have passed thru the front tubes is and around the upper edge of bafile 2i may then follow either one of two paths 25 thru the rear portion of the boiler, one path running downwardly and then horizontally thru superheater units 22, the lower portion of bank 24 and the outlet 34, and the other path running downwardly thru units 33 and then horizontally 30 thru the upper portion of tubes 2'3 and the outlet 35. The lower such path is indicated on the drawing by reference character 4!! and the upper by reference character t2. It is evident that the gas flows in paths and 52 are identical with 35 those thru outlets 34 and 35 respectively so that dampers 3% and 37 may be used to vary the percentages of the total gas flow in the two paths it and 52.

The boiler H i) is shown as associated with a fur- 40 nace chamber 54 lying below and somewhat in front of the tubes is. I have illustrated on the walls of furnace 44 two groups of radiant type superheater units 45 and 38 respectively. In the arrangement illustrated steam is taken from 45 drum i l by pipe 55. Some of the steam from pipe at is passed thru the units 36 and some thru the units 48, such units being connected in parallel as clearly appears from the drawing. However, units it may be in series with units 48 with- 50 in my invention.

Steam from units it and .3 is conducted by pipe 50 to the units 22 and after passing thru units 22 the steam passes thru units 30 and then to the discharge pipe 52. While I have shown units 22 in series with units 30, such groups of units may be in parallel within the invention. By varying the percentage, parts of the total gas flow passing thru path 40 and path 42, the final temperature of the steam in pipe 52 may be varied or maintained constant as desired. Ordinarily, it is desired to maintain the steam temperature constant or nearly so irrespective of the load. The radiant type elements 46 and 48 cooperate with the units 22 and 30 to decrease the amount of regulation required to maintain a substantially constant temperature at the point 52 irrespective of the load. However, I do not limit myself to the use of such radiant type units. Furthermore, placing the units 22 in rows in a group of tubes such as 20 is preferable in that it increases the effect of changing the ratio between the gases in the path 40 and those in path 42, However, I do not limit myself to using tubes 20 and they may be omitted if desired. Preferably, an economizer 54 is placed in the gas flue 56 which receives gases from outlets 34 and 35.

It will be seen I have provided an arrangement permitting regulation of the final steam temperature of a superheater boiler which is very compact and efiicient and can be inserted into boilers already built and not designed with such regulation in mind.

While I have described a given boiler installation in detail, it will be understood that the claims are to be construed broadly and not to be limited by the description of the drawing.

What I claim is:

1. The combination of a boiler having a water drum, an inclined front bank of generating tubes extending upwardly from said drum, a second bank of generating tubes extending upwardly from said drum and lying rearwardly from first said bank, means connecting the upper ends of said banks to provide a thermal circulation therethru, a bafile running upwardly from said drum parallel to the tubes of said first bank, a second bafile at the rear of said first balfle and parallel to it in part but having a horizontal part extending thru said second bank, two groups of superheater units, one of said groups lying immediately at the rear of said first baffle and the other of said groups lying at the rear of and above said second baflie, said group between said bafiies having less heating surface than the other group, and means whereby the relative amounts of gases flowing in said paths may be varied.

2. The combination as set forth in claim 1 and in which the front baffle and the front bank of tubes are so arranged that the units of the smaller groups of superheater units are interspersed among rows of generating tubes.

3. The combination of a Stirling type boiler having a setting provided with a roof, a bafile set back of the front generating tubes but substantially parallel thereto, a second baffle set parallel to said first baffle for a portion of its own length and then extending transversely of the rear row of generating tubes of the boiler and forming with said first baflie and said roof two gas paths in parallel, superheater surface in at least one of said paths, and independently operable dampers for controlling gases in said paths.

CHARLES W. GORDON. 

